New addition to the fleet. Just bought a 1991 560 SEL (blk/blk) with 71,300 mile to go along with my daily driver 1991 420 SEL (blk/blk, 213,000 mi) and my wife's 1991 560 SEC (taupe/cream, 78,000 miles). As I go over the car, I'm sure to pick up some faults needing attention. But first, how do I get rid of the tinted window film the previous owner installed? Is it just a matter of razor blades or is there a preferred method?

J.Chip